<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

   欢迎<span th:text="${user.username}"></span>大爷再次回来.....
   this is index Page And you? <br>

   <a href="/logout">退出</a>

</body>
</html>